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import os
import sys
import struct
import platform
from rpython.rtyper.lltypesystem import lltype, rffi
from rpython.rtyper.tool import rffi_platform
from rpython.rlib.rmmap import alloc, free
from rpython.rlib.rstruct.runpack import runpack
AT_HWCAP = rffi_platform.getconstantinteger('AT_HWCAP', '#include "linux/auxvec.h"')
AT_NULL = rffi_platform.getconstantinteger('AT_NULL', '#include "linux/auxvec.h"')
PPC_FEATURE_HAS_ALTIVEC = rffi_platform.getconstantinteger('PPC_FEATURE_HAS_ALTIVEC',
'#include "asm/cputable.h"')
SYSTEM = platform.system()
def detect_vsx_linux():
try:
fd = os.open("/proc/self/auxv", os.O_RDONLY, 0644)
try:
while True:
buf = os.read(fd, 8)
buf2 = os.read(fd, 8)
if not buf or not buf2:
break
key = runpack("L", buf)
value = runpack("L", buf2)
if key == AT_HWCAP:
if value & PPC_FEATURE_HAS_ALTIVEC:
return True
if key == AT_NULL:
return False
finally:
os.close(fd)
except OSError:
pass
return False
def detect_vsx():
if SYSTEM == 'Linux':
return detect_vsx_linux()
return False
if __name__ == '__main__':
print 'The following extensions are supported:'
if detect_vsx():
print ' - AltiVec'
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